Xref: utzoo comp.unix.questions:25713 comp.unix.shell:280
Path: utzoo!attcan!uunet!mailrus!ncar!boulder!skwu
From: skwu@boulder.Colorado.EDU (WU SHI-KUEI)
Newsgroups: comp.unix.questions,comp.unix.shell
Subject: Re: Counting characters with unix utilities
Message-ID: <26805@boulder.Colorado.EDU>
Date: 24 Sep 90 16:29:57 GMT
References: <4002@umbc3.UMBC.EDU>
Sender: news@boulder.Colorado.EDU
Reply-To: skwu@spot.Colorado.EDU (WU SHI-KUEI)
Organization: University of Colorado, Boulder
Lines: 9

The solution:

	cat file | tr -c 'A' '' | wc -c

is very close.  Just change it to:

	cat file | tr -cd 'A' | wc -c

and you'll count nothing but A's.